I've recently been using the Wollensak - looks like this - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=15000&item=5715660579&rd=1 - Sometimes it sounds a little crackly...it looks like there's a ton of dust inside it...Is there a way I could get in there and clean the dust off? Would that improve the sound? Has anyone ever done this before? If you help me, you will go to heaven.